v0.5.0: standardization release

This release standardizes the API to look more like other keyring stores. It also requires ndk-context initialization, and provides a utility function for doing that.

What's Changed

• Prepare release of v0.5.0 by @brotskydotcom in #12
• Fix instance ID generation. by @brotskydotcom in #13

New Contributors

• @brotskydotcom made their first contribution in #12

Full Changelog: v0.4.0...v0.5.0